Hi, application.mk is probably relevant for native Android developers, not Qt devs. I can't check exactly because I'm not at my main PC right now.

I did a quick research and don't have any exact results.

Bogdan, the creator of Android port of Qt, says it is possible to build a Qt project for all architectures separately, then take the resulting .so libraries with your code and push them into a single APK (Android OS will then pick the right .so for the device automatically). However, I have not found any instructions on how to actually do it. You will have to try yourself.

What the Qt documentation recommends, though, is to build completely separate APKs, and distribute those. Link.